When my migraine happen to me combined with vision blurry , i should use the cool wrap or hear wrap to help?

Different places: First: your blurry or vision disturbance should be before migraine headache. Second: some people swear by cold neck wraps and hot feet wraps, to cause vaso-constriction of the "brain vessels" and vaso-dilation of peripheral vessel, to alleviate migraine. There is no scientific articles that i know of that prove this but it won't hurt. You must however see a neurologist for migraine workup.